ExprEngineCallAndReturn.cpp revision 6960f6e53b0d9a69a460c99ec199470271ff9603
1294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek//=-- ExprEngineCallAndReturn.cpp - Support for call/return -----*- C++ -*-===// 2294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 3294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// The LLVM Compiler Infrastructure 4294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 5294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// This file is distributed under the University of Illinois Open Source 6294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// License. See LICENSE.TXT for details. 7294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 8294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek//===----------------------------------------------------------------------===// 9294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 10294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// This file defines ExprEngine's support for calls and returns. 11294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek// 12294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek//===----------------------------------------------------------------------===// 13294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 14e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks#define DEBUG_TYPE "ExprEngine" 15e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 16d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek#include "clang/Analysis/Analyses/LiveVariables.h" 17294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/CheckerManager.h" 18294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" 19f540c54701e3eeb34cb619a3a4eb18f1ac70ef2dJordan Rose#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h" 20294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek#include "clang/AST/DeclCXX.h" 214a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/ADT/SmallSet.h" 22e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks#include "llvm/ADT/Statistic.h" 234a5f724538cbc275370c9504e8169ce92503256cBenjamin Kramer#include "llvm/Support/SaveAndRestore.h" 24294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 252f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose#define CXX_INLINING_ENABLED 1 262f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 27294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace clang; 28294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekusing namespace ento; 29294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 30e90d3f847dcce76237078b67db8895eb7a24189eAnna ZaksSTATISTIC(NumOfDynamicDispatchPathSplits, 31e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks "The # of times we split the path due to imprecise dynamic dispatch info"); 32e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 333070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenekvoid ExprEngine::processCallEnter(CallEnter CE, ExplodedNode *Pred) { 343070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the entry block in the CFG of the callee. 350849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const StackFrameContext *calleeCtx = CE.getCalleeContext(); 360849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek const CFG *CalleeCFG = calleeCtx->getCFG(); 373070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Entry = &(CalleeCFG->getEntry()); 383070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 393070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Validate the CFG. 403070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->empty()); 413070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek assert(Entry->succ_size() == 1); 423070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 433070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Get the solitary sucessor. 443070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek const CFGBlock *Succ = *(Entry->succ_begin()); 453070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 463070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct an edge representing the starting location in the callee. 470849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek BlockEdge Loc(Entry, Succ, calleeCtx); 483070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 49e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose ProgramStateRef state = Pred->getState(); 503070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek 513070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek // Construct a new node and add it to the worklist. 523070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek bool isNew; 533070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek ExplodedNode *Node = G.getNode(Loc, state, false, &isNew); 543070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Node->addPredecessor(Pred, G); 553070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek if (isNew) 563070e13dca5bbefa32acb80ce4a7b217a6220983Ted Kremenek Engine.getWorkList()->enqueue(Node); 57294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 58294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 590b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// Find the last statement on the path to the exploded node and the 600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks// corresponding Block. 610b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksstatic std::pair<const Stmt*, 620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock*> getLastStmt(const ExplodedNode *Node) { 630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *S = 0; 640b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *SF = 650b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Node->getLocation().getLocationContext()->getCurrentStackFrame(); 66888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 67888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // Back up through the ExplodedGraph until we reach a statement node. 68256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek while (Node) { 69256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek const ProgramPoint &PP = Node->getLocation(); 70888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 71256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (const StmtPoint *SP = dyn_cast<StmtPoint>(&PP)) { 720b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks S = SP->getStmt(); 730b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks break; 74888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } else if (const CallExitEnd *CEE = dyn_cast<CallExitEnd>(&PP)) { 75888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose S = CEE->getCalleeContext()->getCallSite(); 76888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (S) 77888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 78888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // If we have an implicit call, we'll probably end up with a 79888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // StmtPoint inside the callee, which is acceptable. 80888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // (It's possible a function ONLY contains implicit calls -- such as an 81888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // implicitly-generated destructor -- so we shouldn't just skip back to 82888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // the CallEnter node and keep going.) 83888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } else if (const CallEnter *CE = dyn_cast<CallEnter>(&PP)) { 84888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // If we reached the CallEnter for this function, it has no statements. 85888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (CE->getCalleeContext() == SF) 86888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 87256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 88888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 89888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 90256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 91888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 92888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const CFGBlock *Blk = 0; 93888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (S) { 94888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // Now, get the enclosing basic block. 95888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose while (Node && Node->pred_size() >=1 ) { 96888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose const ProgramPoint &PP = Node->getLocation(); 97888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose if (isa<BlockEdge>(PP) && 98888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose (PP.getLocationContext()->getCurrentStackFrame() == SF)) { 99888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose BlockEdge &EPP = cast<BlockEdge>(PP); 100888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Blk = EPP.getDst(); 101888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose break; 102888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 103888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose Node = *Node->pred_begin(); 104888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 105888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose } 106888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose 1070b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return std::pair<const Stmt*, const CFGBlock*>(S, Blk); 108256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 109256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 1100b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// The call exit is simulated with a sequence of nodes, which occur between 1110b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// CallExitBegin and CallExitEnd. The following operations occur between the 1120b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// two program points: 1130b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 1. CallExitBegin (triggers the start of call exit sequence) 1140b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 2. Bind the return value 1150b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 3. Run Remove dead bindings to clean up the dead symbols from the callee. 1160b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 4. CallExitEnd (switch to the caller context) 1170b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks/// 5. PostStmt<CallExpr> 1180b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaksvoid ExprEngine::processCallExit(ExplodedNode *CEBNode) { 1190b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 1 CEBNode was generated before the call. 1200b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1210b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const StackFrameContext *calleeCtx = 1220b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEBNode->getLocationContext()->getCurrentStackFrame(); 1237fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 1247fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // The parent context might not be a stack frame, so make sure we 1257fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // look up the first enclosing stack frame. 1267fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *callerCtx = 1277fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek calleeCtx->getParent()->getCurrentStackFrame(); 1287fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 129294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek const Stmt *CE = calleeCtx->getCallSite(); 1300b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramStateRef state = CEBNode->getState(); 1310b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Find the last statement in the function and the corresponding basic block. 1320b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const Stmt *LastSt = 0; 1330b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks const CFGBlock *Blk = 0; 1340b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks llvm::tie(LastSt, Blk) = getLastStmt(CEBNode); 1350b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 136852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Step 2: generate node with bound return value: CEBNode -> BindedRetNode. 1370b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 138294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // If the callee returns an expression, bind its value to CallExpr. 139852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (CE) { 140852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const ReturnStmt *RS = dyn_cast_or_null<ReturnStmt>(LastSt)) { 141852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose const LocationContext *LCtx = CEBNode->getLocationContext(); 142852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal V = state->getSVal(RS, LCtx); 14357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CE, callerCtx, V); 144852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 1450b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 146852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Bind the constructed object value to CXXConstructExpr. 147852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) { 148852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose loc::MemRegionVal This = 149852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose svalBuilder.getCXXThis(CCE->getConstructor()->getParent(), calleeCtx); 150852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose SVal ThisV = state->getSVal(This); 1510b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 152852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // Always bind the region to the CXXConstructExpr. 15357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose state = state->BindExpr(CCE, callerCtx, ThisV); 154852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose } 155294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 1560b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1570b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 3: BindedRetNode -> CleanedNodes 1580b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // If we can find a statement and a block in the inlined function, run remove 1590b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // dead bindings before returning from the call. This is important to ensure 1600b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // that we report the issues such as leaks in the stack contexts in which 1610b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // they occurred. 1620b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ExplodedNodeSet CleanedNodes; 1630b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (LastSt && Blk) { 16448b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose static SimpleProgramPointTag retValBind("ExprEngine : Bind Return Value"); 16548b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose PostStmt Loc(LastSt, calleeCtx, &retValBind); 16648b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose bool isNew; 16748b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *BindedRetNode = G.getNode(Loc, state, false, &isNew); 16848b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose BindedRetNode->addPredecessor(CEBNode, G); 16948b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose if (!isNew) 17048b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose return; 17148b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose 1720b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(getCoreEngine(), Blk, BindedRetNode); 1730b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks currentBuilderContext = &Ctx; 1740b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Here, we call the Symbol Reaper with 0 statement and caller location 1750b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // context, telling it to clean up everything in the callee's context 1760b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // (and it's children). We use LastStmt as a diagnostic statement, which 1770b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // which the PreStmtPurge Dead point will be associated. 1780b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks removeDead(BindedRetNode, CleanedNodes, 0, callerCtx, LastSt, 1790b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks ProgramPoint::PostStmtPurgeDeadSymbolsKind); 1800b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks currentBuilderContext = 0; 181144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks } else { 182144e52be486a3906aec90c51b0ac94a30313152eAnna Zaks CleanedNodes.Add(CEBNode); 1830b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 1840b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1850b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator I = CleanedNodes.begin(), 1860b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks E = CleanedNodes.end(); I != E; ++I) { 1870b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1880b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 4: Generate the CallExit and leave the callee's context. 1890b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CleanedNodes -> CEENode 190852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose CallExitEnd Loc(calleeCtx, callerCtx); 1910b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks bool isNew; 19248b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ProgramStateRef CEEState = (*I == CEBNode) ? state : (*I)->getState(); 19348b6247804eacc262cc5508e0fbb74ed819fbb6eJordan Rose ExplodedNode *CEENode = G.getNode(Loc, CEEState, false, &isNew); 1940b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks CEENode->addPredecessor(*I, G); 1950b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!isNew) 1960b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks return; 1970b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 1980b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Step 5: Perform the post-condition check of the CallExpr and enqueue the 1990b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // result onto the work list. 2000b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // CEENode -> Dst -> WorkList 2010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks NodeBuilderContext Ctx(Engine, calleeCtx->getCallSiteBlock(), CEENode); 2020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks SaveAndRestore<const NodeBuilderContext*> NBCSave(currentBuilderContext, 2030b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks &Ctx); 2040b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks SaveAndRestore<unsigned> CBISave(currentStmtIdx, calleeCtx->getIndex()); 2050b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 20657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 20757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose CallEventRef<> Call = CEMgr.getCaller(calleeCtx, CEEState); 20857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 20957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet DstPostCall; 21057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose getCheckerManager().runCheckersForPostCall(DstPostCall, CEENode, *Call, 21157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose *this, true); 21257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose 21357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose ExplodedNodeSet Dst; 21457c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose if (isa<ObjCMethodCall>(Call)) { 21557c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose getCheckerManager().runCheckersForPostObjCMessage(Dst, DstPostCall, 21657c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose cast<ObjCMethodCall>(*Call), 21757c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose *this, true); 21857c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else if (CE) { 21957c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose getCheckerManager().runCheckersForPostStmt(Dst, DstPostCall, CE, 22057c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose *this, true); 22157c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } else { 22257c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose Dst.insert(DstPostCall); 22357c033621dacd8720ac9ff65a09025f14f70e22fJordan Rose } 2240b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks 2250b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks // Enqueue the next element in the block. 2260b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks for (ExplodedNodeSet::iterator PSI = Dst.begin(), PSE = Dst.end(); 2270b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks PSI != PSE; ++PSI) { 2280b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks Engine.getWorkList()->enqueue(*PSI, calleeCtx->getCallSiteBlock(), 2290b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks calleeCtx->getIndex()+1); 2300b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 231242384ddb0e0b65dd7e9e0ac0cf3c31cf98b06a6Ted Kremenek } 232294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 233294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 2340849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenekstatic unsigned getNumberStackFrames(const LocationContext *LCtx) { 2350849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek unsigned count = 0; 2360849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek while (LCtx) { 2370849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek if (isa<StackFrameContext>(LCtx)) 2380849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek ++count; 2390849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek LCtx = LCtx->getParent(); 2400849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek } 2410849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek return count; 2420849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek} 2430849ade4bb3e90c2fc0ce01ccd330f76f91da732Ted Kremenek 2446cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks// Determine if we should inline the call. 2457fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenekbool ExprEngine::shouldInlineDecl(const Decl *D, ExplodedNode *Pred) { 2467fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 2476cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks const CFG *CalleeCFG = CalleeADC->getCFG(); 2486cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 24901561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // It is possible that the CFG cannot be constructed. 25001561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek // Be safe, and check if the CalleeCFG is valid. 25101561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek if (!CalleeCFG) 25201561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek return false; 25301561d1039bfdda61edd20eed939011a8632c7c7Ted Kremenek 2546cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (getNumberStackFrames(Pred->getLocationContext()) 2556cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks == AMgr.InlineMaxStackDepth) 2566cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2576cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 2587fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (Engine.FunctionSummaries->hasReachedMaxBlockCount(D)) 2593bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks return false; 2603bbd8cd831788c506f2980293eb3c7e1b3ca2501Anna Zaks 2616cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks if (CalleeCFG->getNumBlockIDs() > AMgr.InlineMaxFunctionSize) 2626cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks return false; 2636cc0969ab37c614d6cf496f2ed6d2fca397a0133Anna Zaks 26410f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek // Do not inline variadic calls (for now). 26510f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) { 26610f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (BD->isVariadic()) 26710f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 26810f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek } 26910f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 27010f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek if (FD->isVariadic()) 27110f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return false; 2725903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks } 2735903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 274d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // It is possible that the live variables analysis cannot be 275d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek // run. If so, bail out. 276d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek if (!CalleeADC->getAnalysis<RelaxedLiveVariables>()) 277d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek return false; 278d4aeb8050a1d0fe47c53a73361c8b0b8ac310f46Ted Kremenek 27910f77ad7fc5e5cf3f37a9b14ff5843468b8b84d2Ted Kremenek return true; 2805903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks} 2815903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks 282e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// The GDM component containing the dynamic dispatch bifurcation info. When 283e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// the exact type of the receiver is not known, we want to explore both paths - 284e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// one on which we do inline it and the other one on which we don't. This is 285e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// done to ensure we do not drop coverage. 286e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// This is the map from the receiver region to a bool, specifying either we 287e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks/// consider this region's information precise or not along the given path. 288e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksnamespace clang { 289e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksnamespace ento { 2906960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaksenum DynamicDispatchMode { DynamicDispatchModeInlined = 1, 2916960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative }; 2926960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks 293e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksstruct DynamicDispatchBifurcationMap {}; 294e90d3f847dcce76237078b67db8895eb7a24189eAnna Zakstypedef llvm::ImmutableMap<const MemRegion*, 2956960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks unsigned int> DynamicDispatchBifur; 296e90d3f847dcce76237078b67db8895eb7a24189eAnna Zakstemplate<> struct ProgramStateTrait<DynamicDispatchBifurcationMap> 297e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks : public ProgramStatePartialTrait<DynamicDispatchBifur> { 298e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks static void *GDMIndex() { static int index; return &index; } 299e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks}; 3006960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks 301e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks}} 302e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 303e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksbool ExprEngine::inlineCall(const CallEvent &Call, const Decl *D, 304e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred, 305e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State) { 306e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(D); 307ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 308c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const LocationContext *CurLC = Pred->getLocationContext(); 309c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose const StackFrameContext *CallerSFC = CurLC->getCurrentStackFrame(); 3107fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const LocationContext *ParentOfCallee = 0; 31169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 312ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: Refactor this check into a hypothetical CallEvent::canInline. 31369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose switch (Call.getKind()) { 31469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Function: 3152f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose break; 31669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_CXXMember: 317e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose case CE_CXXMemberOperator: 3182f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose if (!CXX_INLINING_ENABLED) 3192f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 32069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 321ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case CE_CXXConstructor: { 3222f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose if (!CXX_INLINING_ENABLED) 3232f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3242f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 325da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose // Only inline constructors and destructors if we built the CFGs for them 326da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose // properly. 327da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 328da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose if (!ADC->getCFGBuildOptions().AddImplicitDtors || 329da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose !ADC->getCFGBuildOptions().AddInitializers) 330da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose return false; 3313a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose 332ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXConstructorCall &Ctor = cast<CXXConstructorCall>(Call); 333ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 334e460c46c5d602f65354cab0879c458890273591cJordan Rose // FIXME: We don't handle constructors or destructors for arrays properly. 335ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const MemRegion *Target = Ctor.getCXXThisVal().getAsRegion(); 336e460c46c5d602f65354cab0879c458890273591cJordan Rose if (Target && isa<ElementRegion>(Target)) 337e460c46c5d602f65354cab0879c458890273591cJordan Rose return false; 338e460c46c5d602f65354cab0879c458890273591cJordan Rose 3393a0a9e3e8bbaa45f3ca22b1e20b3beaac0f5861eJordan Rose // FIXME: This is a hack. We don't handle temporary destructors 340888c90ac0ef6baf7d47e86cf5cc4715707d223b1Jordan Rose // right now, so we shouldn't inline their constructors. 341ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXConstructExpr *CtorExpr = Ctor.getOriginExpr(); 342ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (CtorExpr->getConstructionKind() == CXXConstructExpr::CK_Complete) 343ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!Target || !isa<DeclRegion>(Target)) 344ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 345ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 346ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose break; 347ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose } 348ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose case CE_CXXDestructor: { 3492f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose if (!CXX_INLINING_ENABLED) 3502f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3512f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 352ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // Only inline constructors and destructors if we built the CFGs for them 353ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // properly. 354ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const AnalysisDeclContext *ADC = CallerSFC->getAnalysisDeclContext(); 355ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (!ADC->getCFGBuildOptions().AddImplicitDtors || 356ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose !ADC->getCFGBuildOptions().AddInitializers) 357ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 358ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 359ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const CXXDestructorCall &Dtor = cast<CXXDestructorCall>(Call); 360ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 361ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose // FIXME: We don't handle constructors or destructors for arrays properly. 362ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose const MemRegion *Target = Dtor.getCXXThisVal().getAsRegion(); 363ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose if (Target && isa<ElementRegion>(Target)) 364ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose return false; 365ef15831780b705475e7b237ac16418e9b53cb7a6Jordan Rose 366da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose break; 367da5fc53d6b024872c4c1d2c8c5da11e08bf116aaJordan Rose } 36870cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose case CE_CXXAllocator: 3692f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose if (!CXX_INLINING_ENABLED) 3702f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose return false; 3712f9c40a915593849f6b0f5c4de516e2f597d0d66Jordan Rose 37270cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // Do not inline allocators until we model deallocators. 37370cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose // This is unfortunate, but basically necessary for smart pointers and such. 37470cbf3cc09eb21db1108396d30a414ea66d842ccJordan Rose return false; 37569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_Block: { 37669f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const BlockDataRegion *BR = cast<BlockCall>(Call).getBlockRegion(); 377ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose assert(BR && "If we have the block definition we should have its region"); 37869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose AnalysisDeclContext *BlockCtx = AMgr.getAnalysisDeclContext(D); 3797fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = BlockCtx->getBlockInvocationContext(CallerSFC, 38069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose cast<BlockDecl>(D), 3817fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek BR); 38269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose break; 38369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 38469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose case CE_ObjCMessage: 385e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks if (!(getAnalysisManager().IPAMode == DynamicDispatch || 386e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks getAnalysisManager().IPAMode == DynamicDispatchBifurcate)) 387e13056a8bb532ddfdc07952a13169aa422bacd3bAnna Zaks return false; 3889dc5167e4017ef4c8b327abb6f72225eec2e0f19Anna Zaks break; 389256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek } 390ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose 391ee158bc29bc12ce544996f7cdfde14aba63acf4dJordan Rose if (!shouldInlineDecl(D, Pred)) 3927fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return false; 3937fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 3947fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (!ParentOfCallee) 3957fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek ParentOfCallee = CallerSFC; 3967fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 397852aa0d2c5d2d1faf2d77b5aa3c0848068a342c5Jordan Rose // This may be NULL, but that's fine. 39869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Expr *CallE = Call.getOriginExpr(); 39969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 4007fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek // Construct a new stack frame for the callee. 4017fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek AnalysisDeclContext *CalleeADC = AMgr.getAnalysisDeclContext(D); 4027fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek const StackFrameContext *CalleeSFC = 40369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose CalleeADC->getStackFrame(ParentOfCallee, CallE, 4047fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek currentBuilderContext->getBlock(), 4057fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek currentStmtIdx); 4067fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek 407c36b30c92c78b95fd29fb5d9d6214d737b3bcb02Jordan Rose CallEnter Loc(CallE, CalleeSFC, CurLC); 408e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 409e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // Construct a new state which contains the mapping from actual to 410e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose // formal arguments. 411e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = State->enterStackFrame(Call, CalleeSFC); 412e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose 4137fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek bool isNew; 414e54cfc7b9990acffd0a8a4ba381717b4bb9f3011Jordan Rose if (ExplodedNode *N = G.getNode(Loc, State, false, &isNew)) { 4157fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek N->addPredecessor(Pred, G); 4167fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (isNew) 4177fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek Engine.getWorkList()->enqueue(N); 4187fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek } 419e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 420e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we decided to inline the call, the successor has been manually 421e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // added onto the work list so remove it from the node builder. 422e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.takeNodes(Pred); 423e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 4247fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek return true; 425256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek} 426256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 427e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksstatic ProgramStateRef getInlineFailedState(ProgramStateRef State, 42869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const Stmt *CallE) { 429e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks void *ReplayState = State->get<ReplayWithoutInlining>(); 4305903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks if (!ReplayState) 4315903a373db3d27794c90b25687e0dd6adb0e497dAnna Zaks return 0; 43228038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 43328038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose assert(ReplayState == (const void*)CallE && "Backtracked to the wrong call."); 43428038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose (void)CallE; 43528038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose 436e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->remove<ReplayWithoutInlining>(); 43710520d76044e8fff71d414f30c21b449fd104960Ted Kremenek} 43810520d76044e8fff71d414f30c21b449fd104960Ted Kremenek 439294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitCallExpr(const CallExpr *CE, ExplodedNode *Pred, 440294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &dst) { 441294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Perform the previsit of the CallExpr. 442294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstPreVisit; 443294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, CE, *this); 444500abad7edfcc2409b18dd616cdbc28a094926f5Jordy Rose 445d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Get the call in its initial state. We use this as a template to perform 446d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // all the checks. 447d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventManager &CEMgr = getStateManager().getCallEventManager(); 448d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventRef<SimpleCall> CallTemplate 449d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose = CEMgr.getSimpleCall(CE, Pred->getState(), Pred->getLocationContext()); 45069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 45169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Evaluate the function call. We try each of the checkers 452294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // to see if the can evaluate the function call. 453294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet dstCallEvaluated; 45469f87c956b3ac2b80124fd9604af012e1061473aJordan Rose for (ExplodedNodeSet::iterator I = dstPreVisit.begin(), E = dstPreVisit.end(); 45569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose I != E; ++I) { 456d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose evalCall(dstCallEvaluated, *I, *CallTemplate); 45769f87c956b3ac2b80124fd9604af012e1061473aJordan Rose } 45869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 459294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // Finally, perform the post-condition check of the CallExpr and store 460294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek // the created nodes in 'Dst'. 46169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Note that if the call was inlined, dstCallEvaluated will be empty. 46269f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // The post-CallExpr check will occur in processCallExit. 463294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek getCheckerManager().runCheckersForPostStmt(dst, dstCallEvaluated, CE, 464294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek *this); 465294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 466294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek 46769f87c956b3ac2b80124fd9604af012e1061473aJordan Rosevoid ExprEngine::evalCall(ExplodedNodeSet &Dst, ExplodedNode *Pred, 46869f87c956b3ac2b80124fd9604af012e1061473aJordan Rose const SimpleCall &Call) { 469d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // WARNING: At this time, the state attached to 'Call' may be older than the 470d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // state in 'Pred'. This is a minor optimization since CheckerManager will 471d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // use an updated CallEvent instance when calling checkers, but if 'Call' is 472d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // ever used directly in this function all callers should be updated to pass 473d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // the most recent state. (It is probably not worth doing the work here since 474d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // for some callers this will not be necessary.) 475d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 47696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Run any pre-call checks using the generic call interface. 47796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstPreVisit; 47896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPreCall(dstPreVisit, Pred, Call, *this); 47996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 48096479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Actually evaluate the function call. We try each of the checkers 48196479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // to see if the can evaluate the function call, and get a callback at 48296479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // defaultEvalCall if all of them fail. 48396479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose ExplodedNodeSet dstCallEvaluated; 48496479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForEvalCall(dstCallEvaluated, dstPreVisit, 48596479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 48696479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose 48796479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose // Finally, run any post-call checks. 48896479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose getCheckerManager().runCheckersForPostCall(Dst, dstCallEvaluated, 48996479da6ad9d921d875e7be29fe1bfa127be8069Jordan Rose Call, *this); 49069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 49169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 492e81ce256b62717dd846bd19aecc4115a0dcd4995Anna ZaksProgramStateRef ExprEngine::bindReturnValue(const CallEvent &Call, 493e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const LocationContext *LCtx, 494e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks ProgramStateRef State) { 495e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks const Expr *E = Call.getOriginExpr(); 496e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (!E) 497e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State; 498e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 499e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Some method families have known return values. 500e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks if (const ObjCMethodCall *Msg = dyn_cast<ObjCMethodCall>(&Call)) { 501e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks switch (Msg->getMethodFamily()) { 502e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks default: 503e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks break; 504e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_autorelease: 505e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_retain: 506e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks case OMF_self: { 507e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // These methods return their receivers. 508e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, Msg->getReceiverSVal()); 509e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 510e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 511e460c46c5d602f65354cab0879c458890273591cJordan Rose } else if (const CXXConstructorCall *C = dyn_cast<CXXConstructorCall>(&Call)){ 512e460c46c5d602f65354cab0879c458890273591cJordan Rose return State->BindExpr(E, LCtx, C->getCXXThisVal()); 513e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 514e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 515e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks // Conjure a symbol if the return value is unknown. 516e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks QualType ResultTy = Call.getResultType(); 517e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks SValBuilder &SVB = getSValBuilder(); 518e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks unsigned Count = currentBuilderContext->getCurrentBlockCount(); 519e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks SVal R = SVB.getConjuredSymbolVal(0, E, LCtx, ResultTy, Count); 520e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks return State->BindExpr(E, LCtx, R); 521e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks} 522e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 523e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// Conservatively evaluate call by invalidating regions and binding 524e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks// a conjured return value. 525e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::conservativeEvalCall(const CallEvent &Call, NodeBuilder &Bldr, 526e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ExplodedNode *Pred, ProgramStateRef State) { 527e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks unsigned Count = currentBuilderContext->getCurrentBlockCount(); 528e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = Call.invalidateRegions(Count, State); 529e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks State = bindReturnValue(Call, Pred->getLocationContext(), State); 530e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 531e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // And make the result node. 532e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks Bldr.generateNode(Call.getProgramPoint(), State, Pred); 533e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 534e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 535e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaksvoid ExprEngine::defaultEvalCall(NodeBuilder &Bldr, ExplodedNode *Pred, 536d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const CallEvent &CallTemplate) { 537d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // Make sure we have the most recent state attached to the call. 538d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef State = Pred->getState(); 539d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose CallEventRef<> Call = CallTemplate.cloneWithState(State); 540e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks 5415960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (!getAnalysisManager().shouldInlineCall()) { 5425960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 5435960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 5445960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } 54569f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // Try to inline the call. 54628038f33aa2db4833881fea757a1f0daf85ac02bJordan Rose // The origin expression here is just used as a kind of checksum; 547d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // this should still be safe even for CallEvents that don't come from exprs. 548d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose const Expr *E = Call->getOriginExpr(); 549d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose ProgramStateRef InlinedFailedState = getInlineFailedState(State, E); 550d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose 551d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose if (InlinedFailedState) { 552d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose // If we already tried once and failed, make sure we don't retry later. 553d563d3fb73879df7147b8a5302c3bf0e1402ba18Jordan Rose State = InlinedFailedState; 5545960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks } else { 555e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks RuntimeDefinition RD = Call->getRuntimeDefinition(); 556fc05decf08feefd2ffe8cc250219aee6eab3119cAnna Zaks const Decl *D = RD.getDecl(); 557e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks if (D) { 558e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // Explore with and without inlining the call. 5595960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (RD.mayHaveOtherDefinitions() && 560e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks getAnalysisManager().IPAMode == DynamicDispatchBifurcate) { 5615960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks BifurcateCall(RD.getDispatchRegion(), *Call, D, Bldr, Pred); 562e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return; 563e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 5645960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // We are not bifurcating and we do have a Decl, so just inline. 5655960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(*Call, D, Bldr, Pred, State)) 5665960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 567e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 568e81ce256b62717dd846bd19aecc4115a0dcd4995Anna Zaks } 56969f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 57069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose // If we can't inline it, handle the return value and invalidate the regions. 571e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(*Call, Bldr, Pred, State); 572e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks} 57369f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 574e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaksvoid ExprEngine::BifurcateCall(const MemRegion *BifurReg, 575e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks const CallEvent &Call, const Decl *D, 576e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NodeBuilder &Bldr, ExplodedNode *Pred) { 577e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks assert(BifurReg); 578e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 579e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // Check if we've performed the split already - note, we only want 580e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // to split the path once per memory region. 581e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef State = Pred->getState(); 5826960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks const unsigned int *BState = 5836960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->get<DynamicDispatchBifurcationMap>(BifurReg); 5845960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (BState) { 5855960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If we are on "inline path", keep inlining if possible. 5866960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks if (*BState == DynamicDispatchModeInlined) 5875960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks if (inlineCall(Call, D, Bldr, Pred, State)) 5885960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 5895960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // If inline failed, or we are on the path where we assume we 5905960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // don't have enough info about the receiver to inline, conjure the 5915960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks // return value and invalidate the regions. 5925960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, State); 5935960f4aeac9760198c80e05d70d8dadb1db0ff0eAnna Zaks return; 594e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks } 595e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 596e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // If we got here, this is the first time we process a message to this 597e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks // region, so split the path. 598e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef IState = 5996960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 6006960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeInlined); 601e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks inlineCall(Call, D, Bldr, Pred, IState); 602e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 603e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks ProgramStateRef NoIState = 6046960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks State->set<DynamicDispatchBifurcationMap>(BifurReg, 6056960f6e53b0d9a69a460c99ec199470271ff9603Anna Zaks DynamicDispatchModeConservative); 606e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks conservativeEvalCall(Call, Bldr, Pred, NoIState); 607e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 608e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks NumOfDynamicDispatchPathSplits++; 609e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks return; 61069f87c956b3ac2b80124fd9604af012e1061473aJordan Rose} 61169f87c956b3ac2b80124fd9604af012e1061473aJordan Rose 612e90d3f847dcce76237078b67db8895eb7a24189eAnna Zaks 613294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenekvoid ExprEngine::VisitReturnStmt(const ReturnStmt *RS, ExplodedNode *Pred, 614294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek ExplodedNodeSet &Dst) { 615256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 616256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ExplodedNodeSet dstPreVisit; 617256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek getCheckerManager().runCheckersForPreStmt(dstPreVisit, Pred, RS, *this); 618256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 619256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek StmtNodeBuilder B(dstPreVisit, Dst, *currentBuilderContext); 620256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek 621256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek if (RS->getRetValue()) { 622256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek for (ExplodedNodeSet::iterator it = dstPreVisit.begin(), 623256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek ei = dstPreVisit.end(); it != ei; ++it) { 624256ef642f8feef22fd53be7efa868e8e34752eedTed Kremenek B.generateNode(RS, *it, (*it)->getState()); 625294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 626294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek } 627294fd0a62b95f512637910bf85c7efa6c2354b50Ted Kremenek} 628